# This b-file was computed by Antti Karttunen, 2024-11-30 # in GP/PARI CALCULATOR Version 2.9.4 (released) amd64 running linux (x86-64/GMP-6.1.2 kernel) 64-bit version, compiled: Dec 19 2017, gcc version 7.3.0 (Ubuntu 7.3.0-1ubuntu1), threading engine: pthread # with the following program: # # A048673(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); (factorback(f)+1)/2; }; # A336840(n) = sumdiv(n,d,A048673(d)); # memoA378520 = Map(); # A378520(n) = if(1==n,1,my(v); if(mapisdefined(memoA378520,n,&v), v, v = -sumdiv(n,d,if(d